Belch?

You summon a spectral green mouth which vomits a noxious liquid in a 40 ft x 10ft line. Each creature in the line must make a Constitution saving throw, and takes 6d8 acid damage on a failed save, or half as much damage on a successful one. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.